<html>
    <meta name="viewport" content="width=device-width, initial-scale=1">
<head>
    <link rel="stylesheet" href="game.css">
    <script src="mains.js"></script>
</head>

    </div>
<body>
    <div id="main">
        <div class="level">
            <button class="active" id="primaryBtn">初级</button>
            <button class="active" id="intermediateBtn">中级</button>
            <button class="active" id="seniorBtn">高级</button>
            <button class="active" id="restart">重新开始</button>
        </div>
    <div id="gameboard">
        <div class="game-info">
            <div class="remaining"></div>
            <div>&nbsp;&nbsp;&nbsp已用时间：</div>
            <div class="timer">00:00</div>
        </div>
        <table class="mime-grid"></table>
    </div>
</body>
</html>